Tredaire Ambience is rated 2.37 TOG at 9 mm. Whether it works over underfloor heating and which carpets it pairs with under the 2.5 TOG limit.

Updated 05 September 2026.

Underlay TOG rating

Tredaire Ambience TOG rating and underfloor heating

The published TOG and datasheet figures for Tredaire Ambience, and what it means over a heated floor.

1.52.5
2.37TOG
Too warm for UFH

Leaves 0.13 TOG of the combined budget for the carpet on top before the 2.5 TOG limit is reached.

PassMarginalFail
Tredaire Ambience is rated 2.37 TOG. That alone is above the 2.5 TOG combined limit for underfloor heating, so it is not suitable over a heated floor with any carpet.
Published datasheet
ManufacturerInterfloor (Tredaire)
TOG rating2.37 TOG
Thickness9 mm
DensityPU foam
SoundPU foam, premier backing
Underfloor heatingNot suitable

Ambience is a 9 mm PU foam underlay from the upgraded Seventh Heaven range rated 2.37 TOG. Its resistance alone is close to the whole combined limit, so it is a comfort underlay for unheated rooms.

Because Tredaire Ambience is already 2.37 TOG before any carpet is added, no carpet brings the pair back under the 2.5 TOG limit. Over underfloor heating, swap it for a low-TOG underlay instead.

TOG measures thermal resistance, so a low number means heat passes through easily. For a floor covering over underfloor heating that is what you want. A comfort underlay chosen for warmth underfoot does the opposite job and is the usual reason a heated floor underperforms after a carpet goes down.

Pairings and alternatives
Cormar Pimlico with Tredaire Ambiencecombined 2.37 TOGCormar Primo Textures Ribbed with Tredaire Ambiencecombined 2.37 TOGCormar Primo Textures Weave with Tredaire Ambiencecombined 2.27 TOGCormar Apollo Plus with Tredaire Ambiencecombined 2.47 TOGCormar Apollo Elite with Tredaire Ambiencecombined 2.87 TOGCormar Fairisle with Tredaire Ambiencecombined 2.87 TOG

Questions and answers

What is the manufacturer of the Tredaire Ambience TOG rating and underfloor heating?

Interfloor (Tredaire)

What is the tog rating of the Tredaire Ambience TOG rating and underfloor heating?

2.37 TOG

What is the thickness of the Tredaire Ambience TOG rating and underfloor heating?

9 mm

What is the density of the Tredaire Ambience TOG rating and underfloor heating?

PU foam